红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
z1期
145-150
,共6页
TDI CCD%成像系统%非均匀性校正%改进单点法
TDI CCD%成像繫統%非均勻性校正%改進單點法
TDI CCD%성상계통%비균균성교정%개진단점법
TDI CCD%imaging system%non- uniformity correction%improved single- point method
为解决多通道TDI CCD成像系统响应非均匀的问题，根据成像系统视频信号的处理流程，详细分析了影响成像系统响应非均匀性的各个因素，对比了当前主要的非均匀性校正处理方法，提出了改进单点校正法，其集成了单点校正法与两点校正法的优点，具有算法简单，效率高，实用性强，测试工作量小等特点，利用该方法对系统所采集的图像进行非均匀校正，试验结果表明，系统响应的非均匀性由3.5%降低至1.5%，在系统响应全部灰度范围内，最大的非均匀性小于2.5%，满足成像系统的使用要求。
為解決多通道TDI CCD成像繫統響應非均勻的問題，根據成像繫統視頻信號的處理流程，詳細分析瞭影響成像繫統響應非均勻性的各箇因素，對比瞭噹前主要的非均勻性校正處理方法，提齣瞭改進單點校正法，其集成瞭單點校正法與兩點校正法的優點，具有算法簡單，效率高，實用性彊，測試工作量小等特點，利用該方法對繫統所採集的圖像進行非均勻校正，試驗結果錶明，繫統響應的非均勻性由3.5%降低至1.5%，在繫統響應全部灰度範圍內，最大的非均勻性小于2.5%，滿足成像繫統的使用要求。
위해결다통도TDI CCD성상계통향응비균균적문제，근거성상계통시빈신호적처리류정，상세분석료영향성상계통향응비균균성적각개인소，대비료당전주요적비균균성교정처리방법，제출료개진단점교정법，기집성료단점교정법여량점교정법적우점，구유산법간단，효솔고，실용성강，측시공작량소등특점，이용해방법대계통소채집적도상진행비균균교정，시험결과표명，계통향응적비균균성유3.5%강저지1.5%，재계통향응전부회도범위내，최대적비균균성소우2.5%，만족성상계통적사용요구。
To solve the non- uniformity response of multiple outputs in TDI CCD imaging systems, every factors that may influence the non- uniformity response were analyzed in detail according to the flow of video signal process. Compared with popular correction methods of non- uniformity response, an improved method based on single point calibration was proposed, which integrated the advance of single- point correction and two- point correction methods. The improved single- point method has the features of simple algorithm, high efficiency, good practical application, low work of measurement, and so on. The results of experiments show that the non- uniformity response of TDI CCD imaging system declines from 3.5% to 1.5% according to the images using the improved method of single point calibration. The maximum of non- uniformity responses among multiple outputs is less than 2.5% during the full response range. The improved method of single- point calibration can satisfy the requirements of TDI CCD image systems and be practical in engineering.
